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AS43561Vivacom Bulgaria EAD

BulgariaRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS43561 (Vivacom Bulgaria EAD), an access network registered in Bulgaria with RIPE NCC, originates 3 IPv4 prefixes covering 768 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 44,914th-largest of the 79,525 networks we see originating IPv4, and the 287th-largest of 669 in Bulgaria. It is seen behind 1 upstream network, most often AS8866 (Vivacom Bulgaria EAD), and in front of 10 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

3

IPv6 prefixes

1

IPv4 addresses

768

IPv6 /64s

4.3B

Upstream graph

The networks AS43561 is seen behind, one and two hops out, drawn from real AS paths.

AS43561Toward the internet core
Upstream graph for AS43561: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS43561Vivacom Bulgaria …This networkAS8866Vivacom Bulgaria …AS3356Lumen (Level 3)AS9002RETN Limited

Networks observed one and two hops upstream of AS43561 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

22

adjacent networks

Upstreams
15%
Peers
1150%
Downstreams
1045%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS43561
NetworkCountryRelationshipPathsVantage pts
AS8866Vivacom Bulgaria EADBGPeer990145

Prefixes

The largest blocks AS43561 originates, widest first.

Largest prefixes originated by AS43561
PrefixAddressesVisibility
37.157.191.0/2425681/81
95.87.209.0/2425681/81
95.87.255.0/2425681/81
2a02:1338::/324.3B × /6464/64

Routing health

How AS43561's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%4
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%4
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS43561 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.